2. Solved Papers
  3. RAJASTHAN ­ PET

RAJASTHAN ­ PET Rajasthan PET Solved Paper-2011

  • question_answer
    The order of first ionization energies of the elements \[Li,Be,B,Na\] is

    A)  \[Li>Be>B>Na\]

    B)  \[Be>B>Li>Na\]

    C)  \[Na>Li>B>Be\]

    D)  \[Be>Li>B>Na\]

    Correct Answer: B

    Solution :

     lonization energies increase in a period on moving left to right while it decreases in a group on moving downward. The IE of Be is greater than B due to completely filled s-orbital. Hence, the order of IE is as \[Be>B>Li>Na\]


You need to login to perform this action.
You will be redirected in 3 sec spinner